Ophthalmic instrument



Oct. 2, 1945 D. T. STREET I OPHTHALMIC INSTRUMENT Filed Nov; 6, 1943 DONALD T.STREET INVENTOR I BY ,611.

ATTORNEYS tion' of the same.

Patented Oct. 2, 1945 .p:

Bausch & Lomb Optical Company R r '1??? ae' e fi i w Application November 6, 1943, Serial-1N0; .l, if 'sf i o if This invention relates toophthalm-ic instru H "10. Claims.

ments and more trial frames.

Trial frames are often and Opticians to hold test of the patient during an eye examination; As the contours of the face of each; patientvary, these frames are generally adjustable so that'the test lenses can-be disposed-in the desired angular position before'the eyes of"the"patient undergo ing examination. g f It is the general object O-f'thls invention to provicle means for eifecting angular adjustments? of the trialframe for thepurpose above indicated.

It is another object I videan eflicient and-compact constructionnr means for this purpose whichwill facilitate the accurate and quick adjustment of the trial frame with respect to the eyes of thepatient.

particularly to improvements 1 in Other objects and advantages reside in certain i V g the eyes-of -the patient;the lens-holders H may novel features of construction, arrangement and combination of parts as will hereinafter be more: fully described and pointedout in the appended claims. Q j

In the drawing:

bodying the invention. I Fig. 2 is a top plan View of a fragmentary pe Fig. 3 is and enlarged taken on line 3-3 of Fig. 2. i I Fig. 4 is a top sectional view om what" en' Iarged of a" fragmentary'portion of'the trial frame, embodying theinvention. j i T Fig. 5 is a view showing the slotted temple end and cooperating pin; i I H In the drawing, the numeral l0 designate s the body of the trial frame from which depend lens-holders II, the opposite ends of the bdc'lyillf comprising cages I 2 in which the" ends of the temples I3 are adjustably connected to the bodylfl. Y I i In the preferred embodiment of. the invention', and as'shown in Fig. 3, the cages l2 are U-shaped' in cross-section to provide an. internal detail sectional view Fig.1-is a front'elevation' of'a trial frame emf groove M for receiving the temple-adjusting:

mechanism. 1 V I 'Each of the horizontal walls 15 and I t 'de fining the groove I 4, have openingstherein'jfor receiving and supporting bearing member l1 and, I BTcarried by the opposite'endsiof a threaded; shaft l9. The'one end of theshaftproj'ects b yond the wall [5 andcarries aiknurled knob' zll for rotating thejshaft. i I j Theishaft' ljfi is held against lb'ngitudinal e f mentwto-cthe right; as viewed in Fig. 3;by a cas ing 2l: .having -a of spaced walls 22. and 23 formed with apertures 'through which the shaft l9 extends; The aperturein the wall adjacent the. bearing member- H has a diameter less than Jr the diameter-Pot thebeari'ng member and thus this: wall holds the latter against movementwith the shaft. Theshafti'sheld against movement to thefil'eft'pas viewed in the figure referred to, by the-knob 20. The end wall 22- is heldagainst 6 S the bearing member I? by the other end wall 23' engaging the interior surface of the wall I 5 of the cage. The easingll is freely rotatable about the-shawls. v1 1 i As ihJ-Figsfli and 4, the temple [3 l pivotallysecuredto a-l-ug formed-by a projecting Will-1' 2 of the casing:- 2i by-means of ascrew Z-Eanda lock nutzfi 3 Forthe purpose of angularly adjusting the lens-holders H of the trial frame with respect to be tilted atL-a'ny desired angle throughtherelative adjustment betweenthe cages 1*2 'and thetemples l3. For eifecting this result, the screw 25 'erves as a pivot between the cages IZand the temple 'l 3-.; shown in Fig. 3, the temple I3 is offset atthe j'omder' off-the temple with the screwZE tb thereby form a bell crank lever" 21 having- 'g imreate end portion, the slot 21" of which receive's 'apint; integral with a traveling on the sha-ft- I}; The walls 24;

31 and' 132 or the cas'ing 2| form guides for the nut 29 upon -movement of the nut axially of the shaft [9; and pijvent "rotation of the nut as the shaft is rotated. 1 The wall 24- also serves to mainbifurcate end portion of the lever 21 in engagement withthe pin 28;

From theforegoing, it will be apparent that upon rotation of the shaft I 9 by the knob 20, the nut 29 white moved longitudinafly of the V of the nut 29wi'll cam the; 'eyerl'ljahout its pivot, established by the screw 25, to move the temple l3 in a vertical path relative to the 'Iens-holders l-l of thebody I0. Inithusefiecting movementof the temple, it will b e 'fnoted th thefulcrumjof theleverzl, represented byt; jpivot screw 25..15 disposed. almost at theendfiof the lever. As a result, a'smalI diser n ent ojfgthe hO Tt arm? 33 of the lever 2T fietitja consi'derablyflarger displacement of nger; 11 .34? terminating iniftheear engag- A he jtferjnpleif iltisltherefore. readily apparenmnatithe lens-holders. it mayb tilted quickly difpositively to positionthemrelative t9 the t mpl s r3. i relat ve movement r the temples and lens-holders will angularly adjust the lens-holders II with respect to the eyes to permit the-test lenses to occupy the correct angular position relative to the eyes of the patient.

Also, it can be readily seen that as the casin Zlis rotatablymounted on the shaft l'9, and the nut 29 will rotate with lthe casing, the temple may be swung' outwardly or inwardly to permit engagement of the temple ear pieces with the head of the patient and also to permit the temples to be folded inwardly upon the frame.

The outer wall 35 of each, cage carries an adjustable stop member which 'j'may comprise a screw 36 threadedly mounted in'thewalland having at the inner endthereof an enlarged head forming a stop to limit pivotal-movement of the temples about the shaft l9; The screw-36 also can be used to adjust the temples relative to the shaft 19 to. cause the same to snugly engage the head of the patient after the trial frame has been positioned on the head of the patient. 'L- AsHthe templesrl3. are easily disengagedfrom the cages l2 bylremoving the screw 25, other types ofrtemples may be readily 1 attached .to the trial frame by merelyengagingthe slot 21' in the end of; the, temple with the pin. and aligning the opening in the temple with the tapped opening inthe wall 24, of the, casing, 2| to permit the insertion of the'screw 25within the openings and its retention, therein by the lock nut 26. From the foregoing, it will be apparent that .I have provided an improved trial frame having compact and eiiicientgmeans, for quickly and accurately varyi g the angularity of the frame with respect to the eyes of the patient to thereby permit the test lenses to occupy the desired angular position. during the testing of the; eyes of the patient. I I

Various modifications can obviously be, made vithout deparh ngfrom; the spirit of my invention as pointed out in the appended claims. 4

1. In an ophthalmic lens frame, the combination with a body; an elongate member carried at.

an end of said body;

means rotatably mounted on aid te ple intermediate the ends thereof to said rotatably mounted means whereby said temple one end v offsai'd body; means rotatably mounted on"said member; 'fa'temple; a pivot extending normal to'said temple and connecting said temple adj ac'ent'an endthereofto said rotatably mounted means wherebysaid temple may be moved about said elongate member; traveler means fcarried by said elongate member and movable axially thereof; means on said. last-named means interconnectingthe'same'and'the'ndof said temple for moving said temple about said. pivot upon moveabout said piyot causinga substantially larger displacementof the other end of said'temple;

I "3; In' an' ophthalmic len's'frame; the combinaii li z gtsme et-a pivot for co e ti of said traveler meansaxially of said 'elongateimember; the arcuate movement of said end threaded on said threaded member and movable axially thereof; means carried by said nut and engageable with the end of said temple for rocking said temple about its pivot upon rotation of said member.

4. In an ophthalmic lens frame, th combination with a body; a threaded member journaled in an end of said body; means rotatably mounted on said member; a lug carried by said means and extending outwardly therefrom; a temple pivotally connected to said lug and having a slot at one end thereof; a nut carried by said threaded member, said nut held against rotation with said member upon rotation of said member and movable axially thereof; a pin carried bysaid nut and engageable with the slot in said temple for rocking said temple about its pivot upon rotation of said member.

5. In an ophthalmic lens frame, the combination with a body; a threaded member joumaled in an end of said body; a casing rotatably mounted on said member; a temple; a pivot extending normal to said temple and connecting said temple adjacent an end thereof to said casing whereby said temple may be moved about said threaded member; a nut carried by said threaded member and movably axially thereof, said nut engaged by said casing and rotatable therewith; means carried by said nut and engageable with the end of said temple for rocking said temple about its pivot upon rotation of said member.

6.'In an ophthalmic lens frame, the combination with a body having lens-holders depending therefrom; a threaded member journaled in each end of said body; a casing rotatably mounted on said member; a lug carried by said casing and extending outwardly therefrom; a temple pivotally connected intermediate the ends thereof to said lug, said temple having an offset bifurcate end portion; a nut carried by said threaded member and movable axially thereof; a pin carried by said nut and engaging the bifurcate end of said temple for moving said temple about said pivot upon movement of said nut axially of said threaded. member, the pivotal movement of said temple tilting said lens holders to a desired angular position relative to the eyes of aipatient.

7. In an ophthalmic lens frame, the combination with a body; a threaded member journaled in an end of said body; a casing rotatably mounted on said member; a lug carried by said casing and extending outwardly therefrom; a temple, said temple comprising a pair of rigidly interconnected angularly disposed levers of different lengths; a pivot connecting said lug with said templeat the juncture of said levers whereby said temple may be moved about said threaded member; a nut carried by said threaded member and movable axially thereof; a pin carried by said nut and engaging the end of one of said levers for moving the same and the other of said levers about said pivot upon movement of said nut axially of said threaded member,a small displacement of one lever causing a substantially larger displacement of the end of the other lever.

8. In an ophthalmic lens frame, the combina tion with a body; a threaded member journaled mounted on said member; a' lug carried by said with a slot, said temple being pivotally mounted casing and extending outwardly therefrom; a temple, said temple being formed with an angularly extending end portion and forming a bell crank lever; means for pivotally connecting said lug at the juncture of the two arms of said lever whereby said temple may be moved about said threaded member; a nut carried by said threaded member and movable axially thereof; means carried by said nut and engaging the end of one arm of said lever for actuating said other arm of said lever about said pivot, a small displacement of the engaged end of said one arm causing a substantially larger displacement of the end of said other arm.

9. In a, trial frame the combination of a body terminating in a U-shaped end portion, a threaded shaft rotatably mounted between the sides of said end portion, a casing rotatably mounted on said shaft and positioned between said sides, a temple mounted on said casing whereby the temple may turn about said shaft, said temple having an offset end portion provided on said casing by a pivot located adjacent the offset end, a traveling nut carried by said shaft and engaging the threads thereof, a pin carried by said nut and slidably engaging said slot whereby the temple may be adjusted angularly with respect to the body by rotation of said shaft.

10. In' a, lens carrying frame the combination of a body, an elongate member carried by the body, means mounted to turn about the axis of said member, a temple carried by said means whereby it may move about said axis, said temple being pivotally mounted on said means by pivot means located intermediate the ends of the temple and adjacent one end thereof to provide a short lever arm, actuating means movable along said elongate member and operatively connected to the short lever arm of the temple and means for moving said actuating means whereby the temple may be adjusted angularly relative to said body.

DONALD '1. STREET. 

